Traditionally published authors like Stephen King and Suzanne Collins, as well as indy authors like Hugh Howey found their greatest success with books that weren't the first thing they'd ever written. (authormarketinginstitute.com)
One thing about indy authors who go the Kindle route, too: They do well when they sell their e-books cheaply. (stevelaube.com)
I know what indy authors make, being as I am one. (madgeniusclub.com)